<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>transform-rotate函数</title>
        <style>
            img{border-radius: 50%;width:200px;
            transition-property: width;
            transition-duration: 2s;
            }
            img:hover{width:400px;}
        </style>
    </head>
    <body>
        <img src="mei.jpg">
    </body>
</html>